Castle Hotel Windsor 18 High Street Windsor SL4 1LJ

1. 4 Aug 2026

   Received by Windsor and Maidenhead

2. 27 Aug 2026

   Validated

   Checked as complete and ready for consideration.

3. 2 Sep 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 22 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Windsor and Maidenhead took a median of 55 days over the applications it decided in the last year.

This application is with Windsor and Maidenhead for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.

More on heritage and listed buildings applications in our guide

• Castle Hotel Windsor 18 High Street Windsor SL4 1LJ

  26/01913/FULL Submitted 4 Aug 2026 0m away

  71% historically approved · decision due ~22 Oct

  Removal of existing garden fixtures and fittings and provision of replacement seating, entrance gate and front screening, planters. New ground surface with resin-bound gravel, decorative ceiling awning, new garden umbrellas and new escape stair screening fence.

  Awaiting decision Full applications 21 docs
  Small domestic

• Mercure Castle Hotel 18 High Street Windsor SL4 1LJ

  22/00997/FULL Submitted 11 Apr 2022 8m away

  Removal of the existing render at roof level and to the front elevation and undercroft where perished and renew with new breathable render using like for like materials/methods and decorated to match existing. Other works include the cleaning of elevations, formation of a new drip detail to both the parapet and cornice to prevent water ingress, ad-hoc repairs/replacement of roof slate, rainwater goods and leadwork, repairs to the chimney stacks, overhauling and subsequent repairs of the windows, French doors, and sills, and repairs to the balcony and balustrades as required including redecoration.

  Granted Full applications Windows or glazing 25 docs

• Mercure Castle Hotel 18 High Street Windsor SL4 1LJ

  21/03687/CONDIT Submitted 16 Dec 2021 11m away

  Details required by condition 3 (scaffolding) of listed building consent 19/00184/LBC for consent to facade work consisting of works to the parapet, cornice, windows, doors, balustrade and render.

  Granted Conditions Windows or glazing 6 docs

• Mercure Castle Hotel 18 High Street Windsor SL4 1LJ

  22/03266/CONDIT Submitted 6 Dec 2022 11m away

  Details required by Condition 11 (Asbestos Report) of Listed Building Consent (22/00998/LBC) for consent for the removal of the existing render at roof level and to the front elevation and undercroft where perished and renew with new breathable render using like for like materials/methods and decorated to match existing. Other works include the cleaning of elevations, formation of a new drip detail to both the parapet and cornice to prevent water ingress, ad-hoc repairs/replacement of roof slate, rainwater goods and leadwork, repairs to the chimney stacks, overhauling and subsequent repairs of the windows, French doors, and sills, and repairs to the balcony and balustrades as required including redecoration.

  Granted Conditions Windows or glazing 4 docs

• Mercure Castle Hotel 18 High Street Windsor SL4 1LJ

  22/03065/CONDIT Submitted 15 Nov 2022 11m away

  Details required by Condition 7 (sample panel) of Listed Building Consent 22/00998 for Consent for the removal of the existing render at roof level and to the front elevation and undercroft where perished and renew with new breathable render using like for like materials/methods and decorated to match existing. Other works include the cleaning of elevations, formation of a new drip detail to both the parapet and cornice to prevent water ingress, ad-hoc repairs/replacement of roof slate, rainwater goods and leadwork, repairs to the chimney stacks, overhauling and subsequent repairs of the windows, French doors, and sills, and repairs to the balcony and balustrades as required including redecoration.

  Granted Conditions Windows or glazing 7 docs

• Mercure Castle Hotel 18 High Street Windsor SL4 1LJ

  22/02882/CONDIT Submitted 27 Oct 2022 11m away

  Details required by Condition 10 (lead detailing) for Listed Building Consent (22/00998/LBC) for consent for the removal of the existing render at roof level and to the front elevation and undercroft where perished and renew with new breathable render using like for like materials/methods and decorated to match existing. Other works include the cleaning of elevations, formation of a new drip detail to both the parapet and cornice to prevent water ingress, ad-hoc repairs/replacement of roof slate, rainwater goods and leadwork, repairs to the chimney stacks, overhauling and subsequent repairs of the windows, French doors, and sills, and repairs to the balcony and balustrades as required including redecoration.

  Granted Conditions Windows or glazing 7 docs

• 26/01084/LBC Refused

  St Marks Hospital 112 St Marks Road Maidenhead SL6 6DU

  Consent for the retention of works to Blocks 6 and 8, including replacement of internal doors, erection of subdividing walls, installation of new DDA-compliant toilet, replacement of external DDA ramp, installation of window opening to internal partition and proposed replaced of external double doors to Block 6.

  1 May 2026 Heritage and listed buildings
• 26/01367/LBC Refused

  St Marks Hospital 112 St Marks Road Maidenhead SL6 6DU

  Consent for alteration to the front entrance door to Block 6.

  3 Jun 2026 Heritage and listed buildings
• 26/02087/LBC Awaiting decision

  Rails The Green Holyport Road Holyport Maidenhead SL6 2JL

  Consent for the installation of a front entrance doorset following the removal of the existing front entrance door.

  24 Aug 2026 Heritage and listed buildings
• 26/00689/LBC Withdrawn

  1 Garden Flat Front 6 Claremont Road Windsor SL4 3AX

  Consent for a replacement window above the front door.

  16 Mar 2026 Heritage and listed buildings
• 26/02046/DEM Awaiting decision

  Clyde House And The Project Centre Reform Road Maidenhead

  Prior notification for the demolition of all buildings and structures.

  19 Aug 2026 Heritage and listed buildings